Non-inflammable lubricant and process of preparing the same.



, N oDrawing.

UNITED STATES PATENT OFFICE, JONAS w. AIYLSWORTIEIOFYEAST ORANGE, NEW J E RsEY, AssIeNon .or ONE-HALF r0 FRANK L. DYER, or Mo rcLAIn, NEW JERSEY.

NON-INFLAMMAIBLE LUBRICANT AND, PROCESS 'OF PREPARING THE SAME.

Specification of Letters Patent. Application filed October 14, 1910. Serial No. 587,043.

To all whom it may concern: v

Be it known that I, JoNA's W. AYLs- WORTH, a citizen of the United States, and a resident of East Orange, in the county .of Essex and State of New Jersey, have invented a certain new and useful N on lnflammable Lubricant and Process of Preparing the Same, of which the following is a description, I

My invention relates to a new composition of matter for use as a lubricating agent and has for its object the provision of such a composition having certain new and use-- ful properties and also a process for preparlng the same.

The valuable lubricating properties of graphite and oil are well known, but the tendency of the graphite to settle out of the oil greatly impairs the usefulness of such mixtures. In the present invention, an oil is produced which retains the graphite in suspension and has the additional I property of being ditficultly inflammable.

The lubricant forming the subjectmatter of this application 'is composed of a mixture of finely divided graphite and a liquid halogen substitution product of naphthalene,-

preferably a chlorin substitution product. The oily liquid chloro-naphthalene alone is not a sutficiently good lubricator, but the combination of the same with finely divided graphite, either alone or in combination with a thickening ingredient, forms an excellent lubricator having very desirableproperties. Owing to its high specific. grav- .ity and peculiar penetrating and spreading properties and its high boiling point, it forms an excellent medium for holding the finely divided graphite in suspension and spreading the same over bearing surfaces. Since it is heavier than water, it may be used to advantage for lubricating machinery which is run in water. p q

The oil when thickened with'some of the solid chloro-naphthalenes and containing -.25% to 5% of graphite forms an excellent lubricant for the bearings of car axles and otherbearings which frequently become hot 'from hard service and cause fires when the ordinary well known lubricants are used.

The graphite in suitable fine state of divisionis prepared by the prplonged kneading of a pure flake graphite with a sticky viscid semi-solid substance between rolls, such as are used for rubber mixing, and subsequently dissolving out the sticky substance, washing the graphite with the solvent, drying, and mixing with chloro-naphthalene.

Ros n may be used for the sticky substance, in which case the rolls are heated to the point where the rosin becomes sticky, and after grinding with the graphite a suflicient length of time, the rosin may be removed by solution in gasolene and the substance washed with the gasolene. Molasses boiled down to asemi-solid condition may also be used in place of the rosin, in :Which case water may be used to remove the molasses, with the addition of an acid oralkali to hasten the settling of the graphite.

I have found that small percentages of rubber dissolved in the liquid chloro-naphthalene greatly enhance the lubricating power of the liquid chloro-naphthalene. to 2% of rubber may be added, either alone or together with from 20 to of a higher chloro-naphthalene, such as the tri or tetra-chloro-naphthalene.

An exampleof an oil 'which will remain liquid at ordinary temperatures is the following :-liquidchloro-naphthalene, 1000 parts by weight, solid tri or tetra chloronaphthalene, 200 to 600 graphite, 3 to 50 parts by weight.

An example of a heavy oil or grease is the following z-liquid chloro naphthalene, 500 parts; solid higher chloro-napht-halene, 500 to 1000 parts; rubber, 5 to 10 parts; finely divided graphite, 10 to 100 parts.

After the ingredients have been mixed, which should be done hot, the mixture is cooled to a low temperature and made into a uniform mill. Lubricating hydrocarbon oil may be mixed with any of the above described compositions, if desired.

Having now described my invention, what I claim and desire to protect by Letters Patent is as follows 1. As a new composition of matter, a lubricant comprising finely divided graphite and a chlorin substitution product. of naphthalene, substantially as described.

2. As a new composition of matter, a lubricant comprising a liquid halogen substitution product of naphthalene and finely divided graphite in suspension therein, substantially as described.

' 3. As a new composition of matter, lu-

paste by grinding through a paint Patented June 11, 1912.

partsby -weight; rubber, 10 parts by weight; finely divided lene compounded with a hydrocarbon oil thickened with a solid higher chloronaphthalene, and having finely divided graphite suspended therein, substantially as described.

bricant comprising a liquid halogen substitutionlproduct of naphthalene, finely divided graphite,

and a thickening agent, substantially as described. a

4. As a newcomposition of matter, a lubricant comprising liquid chloro-naphtha- 10. As a new composition of matter, a lu- 40 lene, finely divided graphite, and solid bricant comprising liquid chloro-naphthachloro-naphthalene, substantially as delene com ounded with a hydrocarbon oil scribed. 'thickene with a solid higher chloro- 5. As a new composition of matter, a lunaphthalene carrying a small percentage of bricant comprising liquid chloro-naphthadissolved rubber, and having finely divide lene, finely divided graphite, solid chlorographite suspended therein, substantially as naphthalene, and a small percentage of rubdescribed. ber dissolved in the liquid, substantially as -11. The process of preparing a lubricant, described. which consists in kneading flake graphite 6. As a new composition of matter, a luwith a sticky viscid substance, dissolving out bricant comprising liquid chloro-naphthathe latter, and mixing the resulting finely lene containing from 25% to 5% of finely divided vgraphite with liquid chlorodivided graphite suspended therein, substannaphthalene, substantially as described. tially as described. 1.2. The process of preparing a lubricant,

7. As a new composition of matter, a luwhich consists in kneading flake graphite bricant comprising liquid chloro-naphthawith .a sticky viscid substance, dissolv ng lene compounded with from 20 to of a out the latter, and mixmg the result1ng solid higher chloro-naphthalene, and from finely divided graphite with liquid chloroto 2% of rubber dissolved therein and havnaphthalene and dissolving a small percenting finely divided graphite suspended thereage of rubber therein, substantially as de 0 in, substantially as described. 8. As a new composition of matter, a lubricant comprising liquid chloro-naphthascribed. v

This specification signed and witnessed,

this 8th day of October 1910.

lene compounded with a hydrocarbon oil JONAS W AYLSWORTH and having finely divided graphite isus-l pended therein, substantially as described. Witnesses 9; As a new composition of matter, a lu- DYER SMITH,

bricant comprising liquid chloro-naphtha- 

